Ammo Drum: Drop sources, locations, and probabilities

Tips

There are many ways to get Ammo Drum in Warframe, but my recommendation for optimal efficiency would be to try one of these missions (in this order):

• Earth/Mantle : It's a Capture mission (level 2-4). Probability to get it: 11.06%.
• Venus/Venera : It's a Capture mission (level 5-7). Probability to get it: 11.06%.
• Mercury/Elion : It's a Capture mission (level 7-9). Probability to get it: 11.06%.
• Mars/Ara : It's a Capture mission (level 10-12). Probability to get it: 11.06%.
• Phobos/Skyresh : It's a Capture mission (level 12-14). Probability to get it: 11.06%.

These recommendations are based on the usual missions lengths, and the probability of getting the resource dropped.

Missions with a Chance to Get Ammo Drum as a Reward

Warframe Rotations Explained

• Defense: One reward every 5 waves, following this pattern: AABC.
  So, rotation A reward at 5 and 10 waves, B after 15 waves and C for 20 waves.
  Then it starts all over again.
• Rush: Number of transports destroyed:
   - Rotation A: one.
   - Rotation B: two.
   - Rotation C: all three.
  
• Spy: One rotation level gained per vault unlocked.
  First vault is rotation A, two vaults is rotation B, all three vaults unlocked is rotation C.

Mobs Dropping Ammo Drum

Ammo Drum can be dropped by most ennemies in Warframe. You should probably consider this as your primary farm source.

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